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Victron energy MultiPlus-II User manual

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MultiPlus-II/EasySolar-II/Quattro-II Current Sense socket issue
Tech note – December 2021
www.victronenergy.com
Victron Energy B.V. | De Paal 35 | 1351 JG Almere | The Netherlands
E-mail: [email protected] | www.victronenergy.com
Summary
Some MulPlus-II, EasySolar-II and Quaro-II inverter/chargers can, when newly installed, have an
issue with the Current Sense socket. Due to a mechanical fault, the inverter will read wrong values
for the AC input current.
We have received reports of this issue for only a few dozen units, so this is a rare problem. Since the
soluon is very simple, we decided to document it in this Tech Note.
The symptoms show up as soon as the grid is connected to the AC-input, not when inverng, and may include one or more
of these issues:
The AC-input (Grid) reading on the GX and on VRM stays at ‘0.0 W’ or indicates an incorrect value.
The AC Loads show ‘0.0 W’ on the GX and on the VRM dashboard while in fact there is a load connected.
The unit will not charge the baeries, although the charge Led’s on the cover indicate the unit is charging.
When the MP-II is in charger mode, it does not show the charge values on the GX device or on the VRM
Dashboard.
In an ESS system without external grid meter the unit will behave unpredictable feeding back in the grid -or not-
and will show strange values.
Picture le showing incorrect data on (CC)GX and the VRM Dashboard.
Picture right showing 0.0W AC Loads and 63W consumed power from the grid. In reality a 600W load is connected!
Aected models
All MulPlus-II, EasySolar-II and Quaro-II models.
Cause
The cause is a hardware issue with the “Current Sense” socket on the boom side of the unit. When an external current
sensor is connected, the internal one is disconnected through this connector. Somemes the contact inside this connector
gets 'stuck' due to heat during the producon of the board.
Soluons
There is a simple soluon to resolve this problem and no need to raise an e-RMA for this; only create an e-RMA when the
described method below didn’t succeed.
Insert a 3.5mm jack plug a couple of mes and remove it again. E.g. an (old) headphone plug should work. This releases the
‘stuck’ connector and making it properly register that a plug is -not- inserted.
See appendix for details.
Victron Energy B.V. | De Paal 35 | 1351 JG Almere | The Netherlands
E-mail: [email protected] | www.victronenergy.com
Appendix – repair instrucons
These instrucons are provided to help anyone with a MulPus-II, EasySolar-II or Quaro-II which is not behaving as it should.
Trying to solve the issues by following these instrucons is always recommended to do, as it cannot do any harm to the unit.
Step 1: turn the I-0-II switch on the boom of the unit in the ‘0’ (O@) posion.
Step 2: open the black connecon cover by unscrewing the two screws at the boom.
Step 3: insert a 3,5mm jack plug (any 3.5mm jack plug will do the trick, e.g. an old headphone or audio plug) a couple of mes in
the Current Sense socket to 'reset' the connector. Do not leave the plug in the socket, always make sure to remove it.
Step 4: Turn the unit ‘On’ and check on your GX device and/or on the VRM dashboard to see if the AC-input current is showing the
correct values.
Picture of the connec*ons of the Mul*Plus-II. Encircled the Current Sense socket.
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